The vocabulary used to describe heaters designed to be installed over doors can be very confusing. The terms air curtain, screen heater, overdoor heater etc. are bandied about and seem to mean completely different things to different people.
Our main purpose here is to differentiate between two products both which have a useful but distinctly different purpose.
Overdoor heaters are widely used in shops and can be wall-mounted, suspended or recessed into the ceiling above standard height doors. They provide a warm welcome to customers and a localised boost to the air temperature, offsetting the heat loss associated with frequently opening doors. BN Thermic’s 800 Series is ideal for this application. The 800 Series extends from a 3kW model best suited to a single door to 6kW and 9kW models for wider entrances.
All 800 series heaters come with a bracket for wall-mounting and also have threaded holes for drop rod suspension where this installation method is preferred. A remote mounted control box provides on/off/high heat/low heat/fan only settings.
Black Over Door Heaters
To adapt to more modern building aesthetics, BN Thermic have introduced a new range of 3, 6 and 9kW overdoor heaters in a sleek black finish. Like their counterparts in a white finish, these units are UK assembled and can be easily controlled via a CS-7 switch.
All 800 series heaters in a black finish have a ‘B’ suffix at the end of their product code.
Commercial Air Curtains
BN Thermic’s CA commercial air curtain range is better suited to businesses with a more open door policy. This includes applications such as hotel foyers, larger shops, office entrances and restaurants. The CA range mirrors the kW outputs and dimensions of an 800 series range but CA air curtains have a higher m3/h air flow rate. This means they create a more effective barrier and subsequently limit heat loss.
Like the 800 series, all CA air curtains come with mounting bracket as standard and can be controlled remotely by the CS-7 switch.
SystemX – Multi Heater Installs
BN Thermic’s SystemX range allows you to daisy chain multiple heaters and control them via one controller. All control connections are made with CAT5 cable making it incredibly quick to install.
The CA and 800 series ranges are available in a SystemX version with product codes starting XD and XA respectively. This allows you to install multiple overdoor heaters/air curtains and link them to a single controller – ideal for shops with an entrance and an exit next to each other. By using SystemX on these types of installs, installation costs and time can be slashed.
Selecting the Right Overdoor Heater or Air Curtain
Selecting the right overdoor heater or air curtain is very important and can be tricky. For help with product selection, BN Thermic’s engineers are a call away. All they require is the width and height of your door and an idea of the environment the unit is going into.
The below diagram will also assist you in making a decision.